Re: Superheroes Who Kill?
The killing of the nameless, while it may impact upon the character's reputation (or general lack thereof), tends to be generally overlooked, depending upon time/place/witnesses type of concerns.
This primarily means agents. Not innocent bystanders.
The killing of named characters is usually frowned upon, depending on the story and usage of the character in question. After all, others can take up the mantle and replace the deader.